#include <stdio.h>
int main13() {
	char a = 'a';
	char* b = "a\0";

	char* c = "hello world";
	char* c2 = "hello\0 world\0";
	printf("%s\n", c2);

	char d[12] = "hello world\0";
	printf("d=%s\n",d);

	char s = 'c';
	putchar(s);

	return 0;
}